Nut-lock.



UNITED STATESN PATENT OFFICE.

GEORGE L. PITTMAN, OF BETHESDA, OHIO.

NUT-LocK.

SPECIFICATION forming part of Letters Patent No. 709,357, dated. September 16, 1902. Application iiled January 25l 1902. Serial No. 91,248. KNO model.)

To all whom, it 711/001/ concer-rt:

Be it known that I, GEORGE L. PITTMAN, a citizen of the United States, and a resident of Bethesda, in the county of Belmont and State of Ohio, have made a certain new and useful- `had to the accompanying drawings, and to letters and figures of reference marked thereon, which form a part of this specification.

Figure lis a face View of my invention as applied. Fig. 2 is a perspective view of the pawl 2 in detail. Fig. 3 is a detail side elevation of the bolt. Fig. 4 is a fragmentary View showing the pawl as disengaged from the bolt.

The invention relates to nut-locks; and it consists in the novel construction and combination of parts, as hereinafter set forth.

In the accompanying drawings the letter a designates a threaded bolt,and b a nut thereon.

The bolt a is provided with one or more angular or V-form longitudinal grooves c, Whereof the shoulders or bearing portions are radial, facing the lug d of the pawl 2, the'other Sides of the grooves sloping toward such lug at an angle of about forty-live degrees or less.

In each corner portion of the nut is provided a perforation. One of those perforations f receives a pin g, around the head 7L of which is coiled the middle portion of the spring k, whereof one arm Z extends toward a corner of the nut and is provided with a terminal bend m, which engages a corner perforation n. Diagonally opposite this perforation n is a perforation p, in which is secured the pivotpin q, whereby the pawl 2 is attached to the face of the nut.

The pawl 2 is made broad enough to engage one or more of the shouldered ends of the threads of the bolt `in its groove. This pawl is provided upon one side of its pivot with a rear lug extension s, which extends toward the coil w of the spring and engages an up- Ward terminal bend u of the arm c of the spring. The pawl is also provided upon the opposite side of its pivot usually with a handle extension t of its forward end and upon the same side of the pivot as the pawl-tooth, such extension being long enough to reach beyond the perforation z in the other corner of the nut. The lug d of the pawl 2 is held in engagement with a groove of the bolt by means of the spring when the nut is turned home. When, however, it is designed to hold the pawl out of engagement With the nut, so that the latter can turn freely in either direction, a hold-off pin 3 is placed behind the eX- tensiou t of the pawl, such pin engaging the perforation c.

Having described this invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a nut-lock, the combination With a grooved bolt, of the nut, the pawl pivoted to said nut, and having upon one side of its pivot a lug extension, and upon the opposite side of its pivot and upon the same side thereof as the paWl-tooth a handle extension, and the pressure-spring engaging said lug extension, substantially as specified.

2. In a nut-lock, the combination with a grooved bolt, of the nut, the pawl pivoted to vsaid nut, and having upon one side of its pivot a lug extension, and upon the opposite side of its pivot and upon the same side thereof as the pawl-tooth a handle extension, a pressurespring engaging said lug extension, and means adapted to engage said handle extension for maintaining the paWl in elevated position, substantially as specified.

3. A'nut having four corner perforatious, and in connection with one of them, a pin, and thereon a pawl, having a rear lug and a forward extension, in connection with a second perforation, a pin and Jthereon a coilspring having one of its arms engaging the rear lug of said pawl and its other arm engaging the third perforation, the fourth perforation being adapted to receive a hold-off pin,

substantially as specified.

In testimony whereof I al'iix my signature in presence of two witnesses.

GEORGE L. PITTMAN.

Witnesses:

W. J. GovRELL, A. MoAMos. 

